BK/5681-15 Equivalent & Substitute Parts

Part Overview

The BK/5681-15 is a fuse clip cartridge chassis mount component manufactured by Eaton - Bussmann Electrical Division. This single-circuit fuseholder is designed for 1/4" diameter cartridge fuses and features spring bronze contacts with tin finish. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing maintenance, repair, and system support applications where this component is specified in existing designs.

Substiute Parts

BK/5681-15

Eaton - Bussmann Electrical DivisionIn Stock: 1195BK/5681-15 Datasheet

Current PartRFQ

01010002Z

Littelfuse Inc.In Stock: 106101010002Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/5681-15 is determined by the following critical parameters that must remain consistent:

• Mounting Type: Chassis Mount (mechanical interface requirement)
• Fuse Size: 0.25" Dia (6.35mm) (physical compatibility with existing fuse inventory)
• Fuse Type: Cartridge (functional design specification)
• Fuseholder Type: Clip (mechanical retention method)
• Number of Circuits: 1 (electrical configuration)
• Contact Material: Spring Bronze (electrical performance and reliability)

The substitute part 01010002Z from Littelfuse Inc. satisfies all critical substitution parameters. While the substitute introduces additional specifications (15A current rating and 250V voltage rating) not present in the original part documentation, these represent enhanced electrical capability that maintains backward compatibility with the original application context.

Parameter Comparison

Engineering Selection Recommendations

The 01010002Z from Littelfuse Inc. is the qualified substitute for the obsolete BK/5681-15. Selection is based on the following engineering criteria:

Mechanical Compatibility: Both components share identical mounting type (chassis mount), fuse size (0.25" diameter), fuse type (cartridge), and circuit configuration (single circuit), ensuring direct physical and functional replacement.

Electrical Compatibility: The substitute part specifies 15A at 250V, providing defined electrical parameters for the application. The original part documentation does not specify voltage or current ratings; the substitute's ratings establish a clear operational envelope.

Contact System: Both components utilize spring bronze contact material, maintaining electrical performance characteristics. The substitute uses nickel finish versus tin finish on the original; nickel provides equivalent or superior corrosion resistance in standard operating environments.

Product Status and Compliance: The substitute is active production status with ROHS3 compliance certification, ensuring long-term availability and regulatory alignment. The original part is obsolete, making the substitute the only viable path for continued system support.

Regulatory Alignment: Both components share identical ECCN (EAR99) and HTSUS (8538.90.8180) classifications, confirming equivalent regulatory treatment.

Frequently Asked Questions (FAQ)

Q: Can the 01010002Z directly replace the BK/5681-15 in existing assemblies?

A: Yes. Both components are single-circuit cartridge fuse clips with 0.25" diameter fuse accommodation and chassis mount configuration. Physical and functional compatibility is confirmed across all critical parameters.

Q: What is the significance of the 15A and 250V ratings on the substitute part?

A: These ratings define the electrical operating envelope for the 01010002Z. The original BK/5681-15 documentation does not specify these parameters. The substitute's ratings establish maximum safe operating conditions and should be verified against your application requirements.

Q: Why does the substitute have nickel contact finish instead of tin?

A: Both tin and nickel finishes are standard for spring bronze contacts in fuse clip applications. Nickel provides equivalent electrical conductivity and superior long-term corrosion resistance in most industrial environments. Contact finish selection does not affect mechanical or functional compatibility.

Q: Is the ROHS3 compliance of the substitute part a concern?

A: No. ROHS3 compliance indicates the substitute meets current environmental and material restriction standards. This is advantageous for new designs and system updates, with no negative impact on existing applications.

Q: What packaging is available for the substitute part?

A: The 01010002Z is available in bulk packaging, with 958 pieces currently in stock as new original inventory.

Q: Are there any application limitations when substituting?

A: Substitution is valid for all applications where the BK/5681-15 was originally specified, provided the application electrical requirements do not exceed the 01010002Z ratings of 15A at 250V.